Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.7.0.1
Basis of Presentation (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain (loss) on dispositions, net $ (18)   $ (18)    
Buy Seasons | Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Disposal Group Revenue 7 $ 7 13 $ 16  
Disposal Group Net Earnings Loss     (1) $ (5)  
Disposal Group Assets         $ 23
Gain (loss) on dispositions, net     $ (18)    
Maximum | Buy Seasons          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Disposal Group Net Earnings Loss $ (1) $ (1)